2819891856122 has 16 divisors (see below), whose sum is σ = 4614903925632. Its totient is φ = 1281620293920.

The previous prime is 2819891856121. The next prime is 2819891856137. The reversal of 2819891856122 is 2216581989182.

It is not an unprimeable number, because it can be changed into a prime (2819891856121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7242563 + ... + 7621974.

It is an arithmetic number, because the mean of its divisors is an integer number (288431495352).

Almost surely, 2^{2819891856122} is an apocalyptic number.

2819891856122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2819891856122 is a deficient number, since it is larger than the sum of its proper divisors (1795012069510).

2819891856122 is a wasteful number, since it uses less digits than its factorization.

2819891856122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14873173.

The product of its digits is 9953280, while the sum is 62.

The spelling of 2819891856122 in words is "two trillion, eight hundred nineteen billion, eight hundred ninety-one million, eight hundred fifty-six thousand, one hundred twenty-two".